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/*
Nios-sim - one simple NIOSII simulator only for personal interest and fun.
Copyright (C) 2010 chysun2000@gmail.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __IO_DEVICE_H__
#define __IO_DEVICE_H__
#include <stdio.h>
#define ADDR_IS_NOT_DEV (0)
#define ADDR_IS_DEV (1)
#define DEV_HAS_IRQ (1)
#define DEV_NO_IRQ (0)
struct io_device;
struct io_device {
void * priv_data;
char * name;
uint32_t irq_enable_mask;
void (*init)(struct io_device * self);
int32_t (*is_belong)(uint32_t address);
uint32_t (*read_data)(struct io_device * self, uint32_t addr, uint32_t data_len);
void (*write_data)(struct io_device * self, uint32_t addr, uint32_t data, uint32_t data_len);
int32_t (*has_irq)(struct io_device * self);
void (*simulate)(struct io_device * self);
};
struct io_reg {
uint32_t addr;
uint32_t value;
uint32_t valid_mask;
uint32_t only_read_mask;
};
extern void init_devices(void);
extern struct io_device * get_device(uint32_t address);
extern uint32_t io_write_data(uint32_t old_data, uint32_t new_data, uint32_t data_len);
extern uint32_t io_read_data(uint32_t old_data, uint32_t data_len);
extern uint32_t io_write_data_mask(uint32_t old_data, uint32_t new_data, uint32_t data_len,
uint32_t valid_mask, uint32_t only_read_mask);
extern void hw_simulating(void);
extern uint32_t get_io_irq_status(void);
extern uint32_t check_reg_bit(uint32_t value, uint32_t mask);
#endif
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